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Question

Physics Question on Waves

Ratio of intensities of two waves are given by 4 : 1. Then ratio of the amplitudes of the two waves is

A

2 : 1

B

1 : 2

C

4: 1

D

1:4

Answer

2 : 1

Explanation

Solution

I1I2=a2b2=41  ∴  ab=21\frac{I_1}{I_2} =\frac{a^2}{b^2} =\frac{4}{1} \, \, \therefore \, \, \frac{a}{b} = \frac{2}{1}